 \begin{tabular}{l*{3}{c}} \toprule\toprule
            &\multicolumn{3}{c}{}                                             \\
            &\specialcell{Recalled Value\\Physical = 0}         &\specialcell{Recalled Value\\Physical $>$ 0}         &       Total         \\
\midrule
\specialcell{Baseline Value\\Physical = 0}&         216         &          15         &         231         \\
            &                     &                     &                     \\
\specialcell{Baseline Value\\Physical $>$ 0}&          31         &          21         &          52         \\
            &                     &                     &                     \\
\midrule Total       &         247         &          36         &         283         \\
            &                     &                     &                     \\
\bottomrule \bottomrule \end{tabular}
